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U.S. ZIP Codes Database 2026

Search by ZIP code, city, county, or state and find clear postal details with maps, time zones, and area code data.

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Black Hawk County ZIP Codes

Browse all ZIP Codes, cities, and associated area codes registered in Black Hawk County.

County State ZIP Code City Area Codes
Black Hawk County IA 50613 Cedar Falls 319
Black Hawk County IA 50614 Cedar Falls 319
Black Hawk County IA 50623 Dewar 319
Black Hawk County IA 50626 Dunkerton 319
Black Hawk County IA 50634 Gilbertville 319
Black Hawk County IA 50643 Hudson 319
Black Hawk County IA 50651 La Porte City 319
Black Hawk County IA 50667 Raymond 319
Black Hawk County IA 50701 Waterloo 319
Black Hawk County IA 50702 Waterloo 319
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About U.S. ZIP Codes

ZIP codes are a United States Postal Service system introduced in 1963 to make mail routing more accurate and efficient. The standard format uses five digits, while ZIP+4 adds four more digits for a more precise delivery segment.

ZIP codes cover the United States, its territories, military mail routes, and other USPS delivery points. This directory organizes that data for practical lookup by ZIP code, city, county, and state.